TALLAHASSEE, Fla. At least 15 people who visited festivals in central Florida are fighting a dangerous strain of E. coli bacteria, or its effects.

Local health officials think the bacteria may have been picked up at petting zoos, although Florida's health secretary says it could have come from other sources. Eleven of the victims are children.

The strain of E. coli involved can cause a potentially fatal kidney disease known as H-U-S. At least 13 of those known to be infected are hospitalized, three of them in critical condition.

It isn't clear whether the other two people being monitored by state health officials are hospitalized.

All of the sick visited either the Central Florida Fair in Orlando, or the Florida Strawberry Festival in Plant City. Both were held earlier this month."